↑Jacobsen, 2005, Yoga has five principal meanings: 1) yoga as a disciplined method for attaining a goal; 2) yoga as techniques of controlling the body and the mind; 3) yoga as a name of one of the schools or systems of philosophy (darśanaIAST); 4) yoga in connection with other words, such as hatha-, mantra-, and laya-, referring to traditions specialising in particular techniques of yoga; 5) yoga as the goal of yoga practice, p. 4.
↑ Pandit Usharbudh Arya (1985). The philosophy of hatha yoga. Himalayan Institute Press; 2nd ed.
↑ Sri Swami Rama (2008) The royal path: Practical lessons on yoga. Himalayan Institute Press; New Ed edition.
↑ Swami Prabhavananda (Translator), Christopher Isherwood (Translator), Patanjali (Author). (1996). Vedanta Press; How to know god: The yoga aphorisms of Patanjali. New Ed edition.